Method and apparatus for receiving downlink control channel in wireless communication system

ABSTRACT

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A technique for receiving a downlink control channel is provided that includes operations of determining whether a physical downlink shared channel (PDSCH) is received at a time-domain position n; determining, according to a result of the determining, a frequency-domain position of a bandwidth part (BWP) for receiving a physical downlink control channel (PDCCH) at a time-domain position n+1, and receiving the PDCCH at the BWP of the frequency-domain position. The technique determines the frequency-domain position of the BWP for receiving the PDCCH by determining whether it is necessary to receive the PDSCH at the time-domain position preceding the current time-domain position for receiving the PDCCH, greatly reducing or even eliminating the influence of the adjustment time interval for the user equipment (UE) to convert the BWP on the normal data reception of the UE, which ensures the receiving performance and the throughput level of the received data of the UE.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation application of prior application Ser.No. 15/972,667, filed on May 7, 2018, which was based on and claimedpriority under 35 U.S.C. § 119(a) of a Chinese patent application number201710312942.7, filed on May 5, 2017, in the Chinese IntellectualProperty Office, and of a Chinese patent application number201810028300.9, filed on Jan. 11, 2018, in the Chinese IntellectualProperty Office, the disclosure of each of which is incorporated byreference herein in its entirety.

BACKGROUND 1. Field

The disclosure relates to the field of wireless communicationtechnology. More particularly, the disclosure relates to a method and anapparatus for receiving a downlink control channel in a wirelesscommunication system.

DESCRIPTION OF RELATED ART

To meet the demand for wireless data traffic having increased sincedeployment of 4th generation (4G) communication systems, efforts havebeen made to develop an improved 5th generation (5G) or pre-5Gcommunication system. Therefore, the 5G or pre-5G communication systemis also called a ‘Beyond 4G Network’ or a ‘Post long term evolution(LTE) System’.

The 5G communication system is considered to be implemented in higherfrequency millimeter wave (mmWave) bands, e.g., 60 GHz bands, so as toaccomplish higher data rates. To decrease propagation loss of the radiowaves and increase the transmission distance, the beamforming, massivemultiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO),array antenna, an analog beam forming, large scale antenna techniquesare discussed in 5G communication systems.

In addition, in 5G communication systems, development for system networkimprovement is under way based on advanced small cells, cloud radioaccess networks (RANs), ultra-dense networks, device-to-device (D2D)communication, wireless backhaul, moving network, cooperativecommunication, coordinated multi-points (CoMP), reception-endinterference cancellation and the like.

In the 5G system, hybrid frequency shift keying (FSK) and quadratureamplitude modulation (FQAM) and sliding window superposition coding(SWSC) as an advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA), and sparse codemultiple access (SCMA) as an advanced access technology have beendeveloped.

The 5G system may provide services by using very wide bandwidth.However, depending on capability of a user equipment (UE), the UE mayperform communications using a bandwidth that is narrower than a totalsystem bandwidth. Hence, it is needed to effectively operate a basestation and the UE with consideration for the system bandwidth and anoperation bandwidth of the UE.

The above information is presented as background information only toassist with an understanding of the disclosure. No determination hasbeen made, and no assertion is made, as to whether any of the abovemight be applicable as prior art with regard to the disclosure.

SUMMARY

Aspects of the disclosure are to address at least the above-mentionedproblems and/or disadvantages and to provide at least the advantagesdescribed below. Accordingly, an aspect of the disclosure is to providean apparatus method and user equipment for receiving downlink controlchannel with a better throughput performance of data reception.

Another aspect of the disclosure is to provide a method and equipmentfor Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK)information feedback, which may effectively perform transmission ofHARQ-ACK feedback information.

Additional aspects will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of the presented embodiments.

In accordance with an aspect of the disclosure, a method for receivingdownlink control channel, which comprises the following steps:

In accordance with an aspect of the disclosure, deciding whether aphysical downlink shared channel (PDSCH) is received at a time-domainposition n.

In accordance with an aspect of the disclosure, determining afrequency-domain position of a bandwidth part (BWP) for receiving aphysical downlink control channel (PDCCH) at a time-domain position n+1,according to a result of the step of deciding, and receiving the PDCCHat the BP of the frequency-domain position.

Preferably, the step of determining the frequency-domain position of theBP for receiving the PDCCH at the time-domain position n+1 according tothe result of the step of deciding, comprises if the result of the stepof deciding is positive, determining the frequency-domain position ofthe BP for receiving the PDCCH at the time-domain position n+1 to be thesame as a frequency-domain position of the BP where the PDSCH isreceived at the time-domain position n.

Preferably, the step of determining the frequency-domain position of theBP for receiving the PDCCH at the time-domain position n+1 according tothe result of the step of deciding, comprises a step of if the result ofthe step of deciding is negative, determining the frequency-domainposition of the BP for receiving the PDCCH at the time-domain positionn+1 according to whether a PDSCH has been received at a time-domainposition n−k preceding the time-domain position n.

Preferably, the step of determining the frequency-domain position of theBP for receiving the PDCCH at the time-domain position n+1 according towhether the PDSCH has been received at the time-domain position n−kpreceding the time-domain position n, comprises if the PDSCH has beenreceived at the time-domain position n−k, determining thefrequency-domain position of the BP for receiving the PDCCH at thetime-domain position n+1 to be the same as a frequency-domain positionof a BP where the PDSCH has been received at the time-domain positionn−k, and, wherein the time-domain position n−k is a time-domain positionthat is closest to the time-domain position n among time-domainpositions at which a PDSCH has been received.

Preferably, the step of determining the frequency-domain position of theBP for receiving the PDCCH at the time-domain position n+1 according towhether the PDSCH has been received at the time-domain position n−kpreceding the time-domain position n, comprises if no PDSCH has beenreceived at the time-domain position n−k, the frequency-domain positionof the BP for receiving the PDCCH at the time-domain position n+1 isdetermined by a signaling received from a base station.

Preferably, receiving a PDCCH at time-frequency positions configured bya higher-layer signaling, wherein, the time-frequency positionsconfigured by the higher-layer signaling have a same frequency-domainvalue, and performing deciding whether the PDSCH is received at thetime-domain position n, wherein, if a time-domain index of thetime-frequency positions configured by the higher-layer signaling isdenoted as t, then t≠n+1.

Preferably, the step of determining the frequency-domain position of theBP for receiving the PDCCH at the time-domain position n+1 according tothe result of the step of deciding, comprises if the result of the stepof deciding is positive, determining the frequency-domain position ofthe BP for receiving the PDCCH at the time-domain position n+1 by asignaling received from a base station.

Preferably, after the step of determining whether the PDSCH is receivedat the time-domain position n, the method further comprises a step of ifit is necessary to receive the PDSCH at the time-domain position n,receiving the PDSCH at the front part of the time-domain position n.

Preferably, the step of receiving the PDSCH at the front part of thetime-domain position n, comprises receiving the PDSCH within a first a(a is a positive integer) orthogonal frequency division multiplexing(OFDM) symbols at the time-domain position n, and wherein, the a OFDMsymbols are predetermined by an agreed rule or indicated by ahigher-layer signaling.

Preferably, the steps of determining the frequency-domain position ofthe BP for receiving the PDCCH at the time-domain position n+1 accordingto the result of the step of deciding, and receiving the PDCCH at the BPof the frequency-domain position, comprises the step of determining,according to the result of step of deciding, the frequency-domainposition of the BP for receiving the PDCCH at the time-domain positionn+1; and receiving the PDCCH at a time-frequency resource determined bythe frequency-domain position and the posterior part of the time-domainposition n+1.

Preferably, the steps of determining, according to the result of thestep of deciding, the frequency-domain position of the BWP for receivingthe PDCCH at the time-domain position n+1, and receiving the PDCCH atthe time-frequency resource determined by the frequency-domain positionand the posterior part of the time-domain position n+1, comprisedetermining the frequency-domain position of the BWP for receiving thePDCCH at the time-domain position n+1 according to the result of thestep of deciding; and receiving the PDCCH at the time-frequency resourcedetermined by the frequency-domain position and the last b (b is apositive integer) OFDM symbols of the time-domain position n+1, wherein,the b OFDM symbols are predetermined by an agreed rule or indicated bythe higher-layer signaling.

In order to achieve the above purpose, the disclosure further provides aUE for receiving a downlink control channel, which comprising: adeciding module, configured to decide whether it is necessary to receivea physical downlink shared channel (PDSCH) at a time-domain position n;a receiving module, configured to determine, according to a decision ofthe deciding module, a frequency-domain position of a bandwidth part(BWP) for receiving a physical downlink control channel (PDCCH) at atime-domain position n+1, and to receive the PDCCH at the BWP of thefrequency-domain position.

Compared with the prior art, the technical effects of the disclosureinclude by determining whether it is necessary to receive the PDSCH atthe time-domain position preceding the current time-domain positionwhere the PDCCH is received to determine the frequency-domain positionof the BWP where the PDCCH is received, the disclosure greatly reducesor even eliminates the influence of the interval of the adjustment timefor the UE converting BWP on the normal data reception of the UE, andensures the receiving performance of the UE and the throughput level ofthe received data of the UE.

The present disclosure also provides a method for HARQ-ACK informationfeedback, comprising: determining, by a UE, PUCCH resources fortransmitting HARQ-ACK feedback information according to receivedbroadcast information and physical layer information; transmitting, bythe UE, HARQ-ACK on the determined PUCCH resources.

Preferably, the step of determining, by the UE, the PUCCH resources fortransmitting the HARQ-ACK feedback information according to the receivedbroadcast information and physical layer information when the physicallayer information includes PUCCH resource indication information,comprises: determining, by the UE, a PUCCH resource set for transmittingHARQ-ACK feedback information according to the broadcast information byreceiving the broadcast information; selecting, by the UE, one PUCCHresource from the PUCCH resource set to transmit the HARQ-ACK feedbackinformation by receiving the PUCCH resource indication information in aPDCCH scheduling a PDSCH.

Preferably, an indication mode for the PUCCH resources comprises:indicating the PUCCH resources for transmitting the HARQ-ACK feedbackinformation by the broadcast information and the physical layerinformation, or indicating the PUCCH resources for transmitting theHARQ-ACK feedback information by a UE-specific high-layer signaling andthe physical layer information; before the step of determining, by theUE, the PUCCH resources for transmitting the HARQ-ACK feedbackinformation according to the received broadcast information and physicallayer information, the method further comprises: the UE determines theindication mode of the PUCCH resources as follows: indicating the PUCCHresources for transmitting the HARQ-ACK feedback information by thebroadcast information and the physical layer information.

Preferably, in the PUCCH resource set for transmitting the HARQ-ACKfeedback information determined according to the broadcast information,the numbers of PUCCH resources are the same or different.

Preferably, the PUCCH resource indication information includes only ARI;and/or the PUCCH resource indication information comprises the ARI andinformation of other fields.

Preferably, the other fields include at least one of DAI, HARQ timingrelationship indication information, and indication information of thenumber of HARQ processes.

Preferably, the determining the PUCCH resource indication mode comprisesat least one of the following: determining the PUCCH resource indicationmode according to a type of a search space of DCI; determining the PUCCHresource indication mode according to a type of a radio networktemporary identifier of the DCI; determining the PUCCH resourceindication mode jointly according to the type of the search space of theDCI and the type of the RNTI of the DCI; determining the PUCCH resourceindication mode according to a format type of the DCI.

Preferably, the determining the PUCCH resource indication mode accordingto the format type of the DCI comprises: determining the PUCCH resourceindication mode according to the number of bits of the PUCCH resourceindication information in the format type of the DCI.

Preferably, wherein a manner to determine the number of bits of thePUCCH resource indication information comprises: obtaining the number ofbits of the PUCCH resource indication information preset; or determiningthe number of bits of the PUCCH resource indication informationaccording to the number of PUCCH resources in the PUCCH resource setindicated by the broadcast information.

A user equipment is provided, comprising: a PUCCH resource indicationmode determining unit, a resource set determining unit, a resourcedetermining unit, and a transmitting unit; wherein, the PUCCH resourceindication mode determining unit is configured to determine a PUCCHresource indication mode for transmitting HARQ-ACK; the resource setdetermining unit is configured to determine a PUCCH resource set fortransmitting the HARQ-ACK; the resource determining unit is configuredto determine PUCCH resources for transmitting a HARQ-ACK feedbackinformation; and the transmitting unit is configured to transmit theHARQ-ACK according to the determined PUCCH resources.

A user equipment is provided, including: a processor; and a memoryconfigured to store machine-readable instructions that, when executed bythe processor, cause the processor to perform the above described methodfor HARQ-ACK information feedback.

As may be seen from the above technical solution, the method forHARQ-ACK information feedback provided by the present disclosure mayreasonably determine the number of resources in a set of PUCCH resourcesfor transmitting the HARQ-ACK feedback information indicated by aRemaining Minimum System Information (RMSI), so that the users in theserving cells are ensured to access the system in time, and the numberof bits of ARI in the PDCCH used to dynamically indicate the PUCCH isnot wasted.

Other aspects, advantages, and salient features of the disclosure willbecome apparent to those skilled in the art from the following detaileddescription, which, taken in conjunction with the annexed drawings,discloses various embodiments of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the disclosure will be more apparent from the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 illustrates a wireless communication system according to variousembodiments of the disclosure;

FIG. 2A is a schematic diagram of a limited frequency band in which auser equipment (UE) operates in the background art embodiments of thedisclosure;

FIG. 2B is a schematic diagram of an adjustment time for the UEconverting bandwidth part (BWP) in the background art embodiments of thedisclosure;

FIG. 3 illustrates the base station (BS) in the wireless communicationsystem according to various embodiments of the disclosure;

FIG. 4 illustrates the terminal in the wireless communication systemaccording to various embodiments of the disclosure;

FIG. 5 illustrates the communication interface in the wirelesscommunication system according to various embodiments of the disclosure;

FIG. 6 is a flowchart of a method for receiving a downlink controlchannel according to embodiments of the disclosure;

FIG. 7 is a schematic diagram of a BWP where a UE receives a physicaldownlink control channel (PDCCH) in implementation 1 of Embodiment 1 ofthe disclosure;

FIG. 8 is a schematic diagram of a BWP where a UE receives a PDCCH incase 1 in implementation 2 of Embodiment 1 of the disclosure;

FIG. 9 is a schematic diagram of a BWP where a UE receives a PDCCH incase 2 in implementation 2 of Embodiment 1 of the disclosure;

FIG. 10 is a schematic diagram of a BWP where a UE receives a PDCCH incase 3 in implementation 2 of Embodiment 1 of the disclosure;

FIG. 11 is a schematic diagram of a BWP where a UE receives a PDCCH inimplementation 3 of Embodiment 1 of the disclosure;

FIG. 12 is a schematic diagram of a BWP where a UE receives a PDCCH inimplementation 4 of Embodiment 1 of the disclosure;

FIG. 13 is a schematic diagram that a UE receives a physical downlinkshared channel (PDSCH) and a PDCCH at the same frequency-domain positionaccording to embodiments of the disclosure;

FIG. 14 is a schematic diagram that a UE receives a PDSCH and a PDCCH atdifferent frequency-domain positions according to embodiments of thedisclosure;

FIG. 15 is a schematic diagram of a BWP where a UE receives the PDCCH inimplementation 1 of Embodiment 2 of the disclosure;

FIG. 16 is a schematic diagram of a BWP where a UE receives the PDCCH inimplementation 2 of Embodiment 2 of the disclosure;

FIG. 17 is a schematic diagram of a BWP where a UE receives the PDCCH inimplementation 3 of Embodiment 2 of the disclosure;

FIG. 18 is a block diagram of modules of a UE for receiving a downlinkcontrol channel according to the disclosure;

FIG. 19 is a basic flow chart of a method for HARQ-ACK feedbackaccording to the present application; and

FIG. 20 is a basic structural diagram of an equipment for HARQ-ACKfeedback according to the present application.

Throughout the drawings, like reference numerals will be understood torefer to like parts, components, and structures.

DETAILED DESCRIPTION

The following description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of variousembodiments of the disclosure as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding but these are to be regarded as merely exemplary.Accordingly, those of ordinary skill in the art will recognize thatvarious changes and modifications of the various embodiments describedherein can be made without departing from the scope and spirit of thedisclosure. In addition, descriptions of well-known functions andconstructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are notlimited to the bibliographical meanings, but, are merely used by theinventor to enable a clear and consistent understanding of thedisclosure. Accordingly, it should be apparent to those skilled in theart that the following description of various embodiments of thedisclosure is provided for illustration purpose only and not for thepurpose of limiting the disclosure as defined by the appended claims andtheir equivalents.

It is to be understood that the singular forms “a,” “an,” and “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “a component surface” includes referenceto one or more of such surfaces.

Hereinafter, in various embodiments of the disclosure, hardwareapproaches will be described as an example. However, various embodimentsof the disclosure include a technology that uses both hardware andsoftware and thus, the various embodiments of the disclosure may notexclude the perspective of software.

Hereinafter, the disclosure describes technology for receiving adownlink control information in a wireless communication system.

The terms referring to a signal, the terms referring to a channel, theterms referring to control information, the terms referring to a networkentity, and the terms referring to elements of a device used in thefollowing description are used only for convenience of the description.Accordingly, the disclosure is not limited to the following terms, andother terms having the same technical meaning may be used.

Further, although the disclosure describes various embodiments based onthe terms used in some communication standards (for example, 3rdgeneration partnership project (3GPP)), they are only examples for thedescription. Various embodiments of the disclosure may be easilymodified and applied to other communication systems.

FIG. 1 illustrates a wireless communication system according to variousembodiments of the disclosure.

Referring to FIG. 1, a base station (BS) 110, a terminal 120, and aterminal 130 are illustrated as the part of nodes using a wirelesschannel in a wireless communication system. FIG. 1 illustrates only oneBS, but another BS, which is the same as or similar to the BS 110, maybe further included.

The BS 110 is network infrastructure that provides wireless access tothe terminals 120 and 130. The BS 110 has coverage defined as apredetermined geographical region based on the distance at which asignal can be transmitted. The BS 110 may be referred to as “accesspoint (AP),” “evolved NodeB (eNB),” “5th generation (5G) node,”“wireless point,” “transmission/reception point (TRP)” as well as “basestation.”

Each of the terminals 120 and 130 is a device used by a user, andperforms communication with the BS 110 through a wireless channelDepending on the case, at least one of the terminals 120 and 130 mayoperate without user involvement. That is, at least one of the terminals120 and 130 is a device that performs machine-type communication (MTC)and may not be carried by the user. Each of the terminals 120 and 130may be referred to as “UE,” “mobile station,” “subscriber station,”“remote terminal,” “wireless terminal,” or “user device” as well as“terminal.”

The BS 110, the terminal 120, and the terminal 130 may transmit andreceive wireless signals in millimeter wave (mmWave) bands (for example,28 GHz, 30 GHz, 38 GHz, and 60 GHz). At this time, in order to improve achannel gain, the BS 110, the terminal 120, and the terminal 130 mayperform beamforming. The beamforming may include transmissionbeamforming and reception beamforming That is, the BS 110, the terminal120, and the terminal 130 may assign directivity to a transmissionsignal and a reception signal. To this end, the BS 110 and the terminals120 and 130 may select serving beams 112, 113, 121, and 131 through abeam search procedure or a beam management procedure. After that,communications may be performed using resources having a quasico-located relationship with resources carrying the serving beams 112,113, 121, and 131.

A first antenna port and a second antenna ports are considered to bequasi co-located if the large-scale properties of the channel over whicha symbol on the first antenna port is conveyed can be inferred from thechannel over which a symbol on the second antenna port is conveyed. Thelarge-scale properties may include one or more of delay spread, dopplerspread, doppler shift, average gain, average delay, and spatial Rxparameters.

In a new radio (NR) air interface system, a UE is possible to receivedownlink control signaling and data within a part of a bandwidth in alarge frequency-domain bandwidth due to the limited capability of thefrequency domain processing and the relatively large system bandwidth.In order to improve frequency diversity performance of the user, theuser can work within different limited frequency bands at differenttimes.

FIG. 2A is a schematic diagram of a limited frequency band in which auser equipment (UE) operates in the background art embodiments of thedisclosure.

Referring to FIG. 2A, a limited frequency band can be called as a bandpart (BWP) or a bandwidth part (BWP).

FIG. 2B is a schematic diagram of an adjustment time for the UEconverting bandwidth part (BWP) in the background art embodiments of thedisclosure.

When the UE moves from one BWP at the time-domain position n to anotherBWP at the time-domain position n+1, an adjustment time is required,during which the UE cannot normally receive data, as shown in FIG. 2B.

When the UE can be configured to receive a physical downlink controlchannel (PDCCH) and a physical downlink shared channel (PDSCH) in amultiple of BWPs, and only receive the PDCCH and PDSCH within one BWP ata same time, if the position of the BWP where the UE receives the PDCCHat each moment and the way that the UE receives the PDCCH at the BWPcannot be configured properly, the throughput performance of system datareception will be affected. Regarding this, it is necessary to provide amethod and a UE for receiving a downlink control channel which can solvethe above technical problem.

FIG. 3 illustrates the BS in the wireless communication system accordingto various embodiments of the disclosure. A structure exemplified atFIG. 3 may be understood as a structure of the BS 110. The term“-module”, “-unit” or “-er” used hereinafter may refer to the unit forprocessing at least one function or operation and may be implemented inhardware, software, or a combination of hardware and software.

Referring to FIG. 3, the BS may include a wireless communicationinterface 310, a backhaul communication interface 320, a storage unit330, and a controller 340.

The wireless communication interface 310 performs functions fortransmitting and receiving signals through a wireless channel. Forexample, the wireless communication interface 310 may perform a functionof conversion between a baseband signal and bitstreams according to aphysical layer standard of the system. For example, in datatransmission, the wireless communication interface 310 generates complexsymbols by encoding and modulating transmission bitstreams. Further, indata reception, the wireless communication interface 310 reconstructsreception bitstreams by demodulating and decoding the baseband signal.

In addition, the wireless communication interface 310 up-converts thebaseband signal into an radio frequency (RF) band signal, transmits theconverted signal through an antenna, and then down-converts the RF bandsignal received through the antenna into the baseband signal. To thisend, the wireless communication interface 310 may include a transmissionfilter, a reception filter, an amplifier, a mixer, an oscillator, adigital-to-analog convertor (DAC), an analog-to-digital convertor (ADC),and the like. Further, the wireless communication interface 310 mayinclude a plurality of transmission/reception paths. In addition, thewireless communication interface 310 may include at least one antennaarray consisting of a plurality of antenna elements.

On the hardware side, the wireless communication interface 310 mayinclude a digital unit and an analog unit, and the analog unit mayinclude a plurality of sub-units according to operation power, operationfrequency, and the like. The digital unit may be implemented as at leastone processor (e.g., a digital signal processor (DSP)).

The wireless communication interface 310 transmits and receives thesignal as described above. Accordingly, the wireless communicationinterface 310 may be referred to as a “transmitter” a “receiver,” or a“transceiver.” Further, in the following description, transmission andreception performed through the wireless channel may be used to have ameaning including the processing performed by the wireless communicationinterface 310 as described above.

The backhaul communication interface 320 provides an interface forperforming communication with other nodes within the network. That is,the backhaul communication interface 320 converts bitstreams transmittedto another node, for example, another access node, another BS, a highernode, or a core network, from the BS into a physical signal and convertsthe physical signal received from the other node into the bitstreams.

The storage unit 330 stores a basic program, an application, and datasuch as setting information for the operation of the BS 110. The storageunit 330 may include a volatile memory, a non-volatile memory, or acombination of volatile memory and non-volatile memory. Further, thestorage unit 330 provides stored data in response to a request from thecontroller 340.

The controller 340 controls the general operation of the BS. Forexample, the controller 340 transmits and receives a signal through thewireless communication interface 310 or the backhaul communicationinterface 320. Further, the controller 340 records data in the storageunit 330 and reads the recorded data. The controller 340 may performsfunctions of a protocol stack that is required from a communicationstandard. According to another implementation, the protocol stack may beincluded in the wireless communication interface 310. To this end, thecontroller 340 may include at least one processor. According toexemplary embodiments of the disclosure, the controller 340 may controlthe base station to perform operations according to the exemplaryembodiments of the disclosure.

FIG. 4 illustrates the terminal in the wireless communication systemaccording to various embodiments of the disclosure. A structureexemplified at FIG. 4 may be understood as a structure of the terminal120 or the terminal 130. The term “-module”, “-unit” or “-er” usedhereinafter may refer to the unit for processing at least one functionor operation, and may be implemented in hardware, software, or acombination of hardware and software.

Referring to FIG. 4, the terminal 120 includes a communication interface410, a storage unit 420, and a controller 430.

The communication interface 410 performs functions fortransmitting/receiving a signal through a wireless channel. For example,the communication interface 410 performs a function of conversionbetween a baseband signal and bitstreams according to the physical layerstandard of the system. For example, in data transmission, thecommunication interface 410 generates complex symbols by encoding andmodulating transmission bitstreams. Also, in data reception, thecommunication interface 410 reconstructs reception bitstreams bydemodulating and decoding the baseband signal. In addition, thecommunication interface 410 up-converts the baseband signal into an RFband signal, transmits the converted signal through an antenna, and thendown-converts the RF band signal received through the antenna into thebaseband signal. For example, the communication interface 410 mayinclude a transmission filter, a reception filter, an amplifier, amixer, an oscillator, a DAC, and an ADC.

Further, the communication interface 410 may include a plurality oftransmission/reception paths. In addition, the communication interface410 may include at least one antenna array consisting of a plurality ofantenna elements. In the hardware side, the wireless communicationinterface 310 may include a digital circuit and an analog circuit (forexample, a radio frequency integrated circuit (RFIC)). The digitalcircuit and the analog circuit may be implemented as one package. Thedigital circuit may be implemented as at least one processor (e.g., aDSP). The communication interface 410 may include a plurality of RFchains. The communication interface 410 may perform beamforming.

The communication interface 410 transmits and receives the signal asdescribed above. Accordingly, the communication interface 410 may bereferred to as a “transmitter,” a “receiver,” or a “transceiver.”Further, in the following description, transmission and receptionperformed through the wireless channel is used to have a meaningincluding the processing performed by the communication interface 410 asdescribed above.

The storage unit 420 stores a basic program, an application, and datasuch as setting information for the operation of the terminal 120. Thestorage unit 420 may include a volatile memory, a non-volatile memory,or a combination of volatile memory and non-volatile memory. Further,the storage unit 420 provides stored data in response to a request fromthe controller 430.

The controller 430 controls the general operation of the terminal 120.For example, the controller 430 transmits and receives a signal throughthe communication interface 410. Further, the controller 430 recordsdata in the storage unit 420 and reads the recorded data. The controller430 may performs functions of a protocol stack that is required from acommunication standard. According to another implementation, theprotocol stack may be included in the communication interface 410. Tothis end, the controller 430 may include at least one processor ormicroprocessor, or may play the part of the processor. Further, the partof the communication interface 410 or the controller 430 may be referredto as a communication processor (CP). According to exemplary embodimentsof the disclosure, the controller 430 may control the terminal toperform operations according to the exemplary embodiments of thedisclosure.

FIG. 5 illustrates the communication interface in the wirelesscommunication system according to various embodiments of the disclosure.FIG. 5 shows an example for the detailed configuration of thecommunication interface 310 of FIG. 3 or the communication interface 410of FIG. 4. More specifically, FIG. 5 shows elements for performingbeamforming as part of the communication interface 310 of FIG. 3 or thecommunication interface 410 of FIG. 4.

Referring to FIG. 5, the communication interface 310 or 410 includes anencoding and circuitry 502, a digital circuitry 504, a plurality oftransmission paths 506-1 to 506-N, and an analog circuitry 508.

The encoding and circuitry 502 performs channel encoding. For thechannel encoding, at least one of a low-density parity check (LDPC)code, a convolution code, and a polar code may be used. The encoding andcircuitry 502 generates modulation symbols by performing constellationmapping.

The digital circuitry 504 performs beamforming for a digital signal (forexample, modulation symbols). To this end, the digital circuitry 504multiples the modulation symbols by beamforming weighted values. Thebeamforming weighted values may be used for changing the size and phraseof the signal, and may be referred to as a “precoding matrix” or a“precoder.” The digital circuitry 504 outputs the digitally beamformedmodulation symbols to the plurality of transmission paths 506-1 to506-N. At this time, according to a multiple input multiple output(MIMO) transmission scheme, the modulation symbols may be multiplexed,or the same modulation symbols may be provided to the plurality oftransmission paths 506-1 to 506-N.

The plurality of transmission paths 506-1 to 506-N convert the digitallybeamformed digital signals into analog signals. To this end, each of theplurality of transmission paths 506-1 to 506-N may include an inversefast Fourier transform (IFFT) calculation unit, a cyclic prefix (CP)insertion unit, a DAC, and an up-conversion unit. The CP insertion unitis for an orthogonal frequency division multiplexing (OFDM) scheme, andmay be omitted when another physical layer scheme (for example, a filterbank multi-carrier: FBMC) is applied. That is, the plurality oftransmission paths 506-1 to 506-N provide independent signal processingprocesses for a plurality of streams generated through the digitalbeamforming. However, depending on the implementation, some of theelements of the plurality of transmission paths 506-1 to 506-N may beused in common.

The analog circuitry 508 performs beamforming for analog signals. Tothis end, the digital circuitry 504 multiples the analog signals bybeamforming weighted values. The beamformed weighted values are used forchanging the size and phrase of the signal. More specifically, accordingto a connection structure between the plurality of transmission paths506-1 to 506-N and antennas, the analog circuitry 508 may be configuredin various ways. For example, each of the plurality of transmissionpaths 506-1 to 506-N may be connected to one antenna array. In anotherexample, the plurality of transmission paths 506-1 to 506-N may beconnected to one antenna array. In still another example, the pluralityof transmission paths 506-1 to 506-N may be adaptively connected to oneantenna array, or may be connected to two or more antenna arrays.

FIG. 6 is a flowchart of a method for receiving a downlink controlchannel according to the disclosure.

Referring FIG. 6, in operation 601, a UE determines whether a PDSCH isreceived at a time-domain position n. In operation 603, the UEdetermines the frequency-domain position of the BWP for receiving aPDCCH at a time-domain position n+1, and receiving the PDCCH at the BWPof the frequency-domain position according to a result of the step ofdeciding.

The method for receiving a downlink control channel of the disclosurecan be applied to a wireless communication system with limited bandwidthcapability. The method for receiving a downlink control channel of thedisclosure will be described by the following several embodiments.

Embodiment 1

This embodiment describes a process in which the UE determines the BWPwhere a PDCCH and a PDSCH are received, wherein, the PDCCH is used fortransmitting downlink control information (DCI), and the PDSCH is usedfor transmitting data.

When the UE is configured with more than one BWPs, the bandwidth rangeof all BWPs configured for the UE exceeds the bandwidth capability ofthe UE due to the limited bandwidth capability, therefore, the UE cannotreceive the PDCCH and PDSCH within a multiple of BWPs at the samemoment; or, due to other reasons, the UE determines to detect andreceive the PDCCH on one or more configured BWPs by receiving theconfiguration information of the base station, therefore, the UE cannotreceive the PDCCH and PDSCH within a multiple of BWPs at the samemoment. When the UE cannot receive the PDCCH and PDSCH within a multipleof BWPs at the same moment, here are several methods for the UEreceiving the PDCCH in the following. In these methods, the BWP wherethe UE receives PDSCH is dynamically indicated through information fieldin the DCI.

Implementation Method 1

FIG. 7 is a schematic diagram of a BWP where a UE receives a physicaldownlink control channel (PDCCH) in implementation 1 of Embodiment 1 ofthe disclosure.

Referring to FIG. 7, the UE determines to detect and receive the PDCCHon one or more configured BWPs by receiving the higher-layer signalingconfiguration. In this case, the BWP where the UE detects and receivesthe PDCCH is possible to be the same as or different from the BWP wherethe PDSCH has previously been detected and received. When the BWP wherethe UE detects and receives the PDCCH is different from the BWP wherethe PDSCH has previously been detected and received, a time interval isrequired to adjust the frequency. Within this time interval, the UEcannot receive the DCI and the data correctly.

Implementation Method 2

FIG. 8 is a schematic diagram of a BWP where a UE receives a PDCCH incase 1 in implementation 2 of Embodiment 1 of the disclosure.

If the BWP where the UE detects the PDCCH is configured by thehigher-layer signaling, the UE needs to frequently switch the BWPs toseparately detect and receive the PDSCH and the PDCCH, thereby wastingresources. Therefore, the BWP where the UE detects the PDCCH needs to beconfigured to be dynamically variable.

For example, a method which can be used is that: if the BWP sequencenumber of the BWP where the UE receives the PDSCH in time slot n is m,the UE detects the PDCCH in time slot n+1 and on the BWP with BWPsequence number m, so that the UE does not need an interval time toadjust the frequency, which can save resources, as shown in FIG. 8.

FIG. 9 is a schematic diagram of a BWP where a UE receives a PDCCH incase 2 in implementation 2 of Embodiment 1 of the disclosure.

FIG. 10 is a schematic diagram of a BWP where a UE receives a PDCCH incase 3 in implementation 2 of Embodiment 1 of the disclosure.

If the UE does not receive the PDSCH in the time slot n, the UE detectsthe PDCCH in time slot n+1 and on the BWP with BWP sequence number p,and p is determined by the signaling (for example, higher-layersignaling) of the base station received by the UE, as shown in FIG. 9.Or, if the UE does not receive the PDSCH in time slot n, the UE detectsthe PDCCH in time slot n+1 and on the BWP with BWP sequence number p,wherein, p is the BWP sequence number in the time slot which ispreceding and closest to the time slot n and has ever received thePDSCH, if the PDSCH is not received before, then the UE determines theBWP sequence number p by receiving the signaling (such as thehigher-layer signaling) of the base station, as shown in FIG. 10.

In such design, the latency and resource consumption of converting BWPby UE can be avoided as much as possible. In this case, the BWP wherethe UE detects the PDCCH can be the same as the BWP where the PDSCH haspreviously been received.

Implementation Method 3

FIG. 11 is a schematic diagram of a BWP where a UE receives a PDCCH inimplementation 3 of Embodiment 1 of the disclosure.

Please refer to FIG. 11. The UE detects and receives the PDCCH within aconfigured time slot and on a BWP configured by a high-layer signaling.For example, the UE detects the PDCCH on a BWP with a sequence number mconfigured by a higher-layer signaling within periodically distributedtime slots, for example, within a first time slot of every 10 timeslots; in other time slots, the BWP where the UE detects and receivesthe PDCCH can be dynamically variable, for example, the UE can detectthe PDCCH on a BWP with a sequence number q which is indicated by aphysical layer signaling or a media access control (MAC) layersignaling, and the physical layer signaling or the MAC layer signalingcan be transmitted on the PDCCH of the BWP configured by thehigher-layer signaling.

Implementation Method 4

The UE detects and receives the PDCCH within a configured time slot andon a BWP configured by a higher-layer signaling. For example, the UEdetects the PDCCH on the BWP with the sequence number m configured by ahigher-layer signaling within periodically distributed time slots, forexample, within a first time slot of every 10 time slots; in other timeslots, the BWP where the UE detects and receives the PDCCH can bedynamically variable. For example, the method described inimplementation method 2 of Embodiment 1 can be used to determine the BWPwhere the UE detects the PDCCH in other time slots.

FIG. 12 is a schematic diagram of a BWP where a UE receives a PDCCH inimplementation 4 of Embodiment 1 of the disclosure.

For example, if the BWP sequence number of the BWP where the UE receivesthe PDSCH in time slot n is h, the UE detects the PDCCH in time slot n+1and on the BWP with the BWP sequence number h, so that the UE does notneed an interval time to adjust the frequency and resources can besaved, as shown in FIG. 12. If the UE does not receive the PDSCH in timeslot n, the UE detects the PDCCH in time slot n+1 and on the BWP withsequence number m configured by the higher-layer signaling. Or, if theUE does not receive the PDSCH in time slot n, the UE detects the PDCCHin time slot n+1 and on the BWP with BWP sequence number p, wherein p isthe BWP sequence number in the time slot which is preceding and closestto the time slot n and has ever received the PDSCH. If the PDSCH is notreceived before, the UE determines the sequence number p of the BWP byreceiving the signaling of the base station.

Implementation Method 5

The BWP where the UE receives the PDCCH is variable. Before the UEreceives the physical layer signaling or MAC layer signaling indicationto change the BWP where the UE detects the BWP, the UE maintains the BWPwhere the UE detects the PDCCH unchanged, for example, the UE configurestwo BWPs, and detects the PDCCH on BWP1 through the higher-layersignaling configuration. If the UE does not detect the PDCCH on the BWPwith sequence number 2 of the physical layer signaling or MAC layersignaling indication, the UE always detects the PDCCH on BWP1. If the UEdetects the PDCCH on the BWP with the BWP sequence number 2 of thephysical layer signaling or MAC layer signaling indication, the UEdetects the PDCCH on BWP2 until receiving a new physical layer signalingor MAC layer signaling indication. Or, the UE determines the BWP wherethe UE detects the PDCCH by measurement and reports to the base station.

Embodiment 2

FIG. 13 is a schematic diagram that a UE receives a PDSCH and a PDCCH atthe same frequency-domain position according to embodiments of thedisclosure.

FIG. 14 is a schematic diagram that a UE receives a PDSCH and a PDCCH atdifferent frequency-domain positions according to embodiments of thedisclosure.

When the UE detects and receives PDSCH in time slot n and detects andreceives PDCCH in time slot n+1, the BWP where the UE detects andreceives PDCCH can be the same as (as shown in FIG. 13) or differentform (as shown in FIG. 14) the BWP where the PDSCH is previouslydetected and received. When the BWP where the UE detects the PDCCH isdifferent from the BWP where the PDSCH has previously been detected (forexample, in the cases of implementation methods 1 and 3 of Embodiment1), a time interval is required to adjust the frequency, and the UEcannot receive the DCI and data within this time interval correctly.This embodiment introduces several processing methods in the above case,that is, when the UE needs to have a time interval to adjust thereceiving frequency between two time slots.

Implementation Method 1

FIG. 15 is a schematic diagram of a BWP where a UE receives the PDCCH inimplementation 1 of Embodiment 2 of the disclosure.

Please refer to FIG. 15. One processing method is that: if the UEreceives the PDSCH in time slot n and wants to detect the PDCCH in timeslot n+1, the UE does not receive the PDSCH at the posterior part of thetime-domain position for receiving the PDSCH, for example, within thelast L OFDM symbols of time slot n (L is a positive integer, which isconfigured by higher-layer signaling or predetermined by an agreedrule). In this way, the changes to the prior art are relatively small,because the positions of the reference symbols of the PDSCH can maintainthe same.

Implementation Method 2

FIG. 16 is a schematic diagram of a BWP where a UE receives the PDCCH inimplementation 2 of Embodiment 2 of the disclosure.

Please refer to FIG. 16. Another processing method is that: if the UEreceives the PDSCH in time slot n and needs to detect the PDCCH in timeslot n+1, the UE does not receive the PDSCH at the posterior part of thetime-domain position for receiving the PDSCH, for example, within thelast P OFDM symbols of time slot n (P is a positive integer, which isconfigured by higher-layer signaling or predetermined by an agreedrule), and meanwhile the UE detects the PDCCH at the posterior part ofthe time-domain position where the PDCCH is detected, for example,receives the PDCCH starting from the first (Q+1)^(th) OFDM symbols (Q isa positive integer, which is configured by the higher-layer signaling orpredetermined by an agreed rule) of the time slot n+1. In this way, thetime interval can be evenly distributed within two time slots, and theeffect on the PDCCH and the PDSCH is relatively small. However, theposition of the reference symbol of the PDCCH is possible to need to bechanged.

Implementation Method 3

FIG. 17 is a schematic diagram of a BWP where a UE receives the PDCCH inimplementation 3 of Embodiment 2 of the disclosure.

Please refer to FIG. 17. Another processing method is that, if the UEreceives the PDSCH in time slot n and needs to detect the PDCCH in timeslot n+1, the UE detects the PDCCH at the posterior part of thetime-domain position where the PDCCH is detected, for example, detectsthe PDCCH starting from the first (Q+1)^(th) OFDM symbols (Q is apositive integer, which is configured by higher-layer signaling orpredetermined by protocol) of the time slot n+1. In this way, even ifthe UE does not detect the PDCCH within the time slot n+1, the receptionof the PDSCH in time slot n is not affected. However, the position ofthe reference symbol of the PDCCH is possible to need to be changed.

Embodiment 3

This embodiment provides another method for receiving a PDCCH by a UE.

Implementation Method 1

First, the UE determines that it is necessary to receive the PDCCH intime slot n. Then, the UE determines that time slot n−k should satisfythe following conditions: (1) the time slot n−k is closest to the timeslot n; and (2) the UE has received the PDSCH in the time slot n−k.Finally, the UE detects the PDCCH in the time slot n and on the BWP withthe BWP sequence number p, where p is the BWP sequence number of the BWPwhere the UE has received the PDSCH in the time slot n−k.

Implementation Method 2

First, the UE determines that it is necessary to receive the PDCCH intime slot n. Then, the UE determines whether there is a time slot n−k (kis a positive integer) preceding the time slot n, and the time slot n−ksatisfies the following conditions: (1) the time slot n−k is closest tothe time slot n; (2) the UE has received the PDSCH in the time slot n−k.If the UE determines that there is no time slot n−k, the UE detects thePDCCH in time slot n and on the BWP with the BWP sequence number p, andp is determined by the signaling (for example, higher-layer signaling,MAC layer signaling or physical layer signaling) of the base stationreceived by the UE. If the UE finds the time slot n−k, the UE detectsthe PDCCH in the time slot n and on the BWP with the BWP sequence numberp, wherein, p is the BWP sequence number of the BWP where the UEreceives the PDSCH in the time slot n−k.

Implementation Method 3

The UE detects and receives the PDCCH within a configured time slot andon a BWP configured by a higher-layer signaling. For example, the UEdetects a PDCCH on a BWP with a sequence number m configured by ahigher-layer signaling within periodically distributed time slots, forexample, in a first time slot of every 10 time slots; in other timeslots, the BWP where the UE detects and receives the PDCCH isdynamically variable, for example, the method described inimplementation method 1 or 2 of Embodiment 3 can be used to determinethe BWP where the UE detects the PDCCH in other time slots.

FIG. 18 is a block diagram of modules of a UE for receiving a downlinkcontrol channel according to the disclosure.

Referring to FIG. 18, a UE for receiving a downlink control channelaccording to the disclosure, comprises:

a determining module 1810, configured to decide whether is received aPDSCH at a time-domain position n;

a receiving module 1820, configured to determine, according to adecision of the determining module 1810, the frequency-domain positionof the BWP for receiving a PDCCH at a time-domain position n+1, andreceiving the PDCCH at the BWP of the frequency-domain position.

The operating processes of the determining module 1810 and the receivingmodule 1820 respectively correspond to embodiments 101 and 102 of themethod for receiving a downlink control channel according to thedisclosure, and details are not described herein again.

With reference to the above detailed disclosure of the disclosure, itcan be seen that, compared with the prior art, the disclosure has atleast the following beneficial technical effects:

First, the disclosure determines the frequency-domain position of theBWP for receiving the PDCCH by determining whether it is necessary toreceive the PDSCH at the time-domain position preceding the currenttime-domain position for receiving the PDCCH, greatly reducing or eveneliminating the influence of the adjustment time interval for the UE toconvert the BWP on the normal data reception of the UE, which ensuresthe receiving performance and the throughput level of the received dataof the UE.

Second, by dynamically configuring the position of BWP where the PDCCHis received, a case that the position of the BWP where the PDCCH isreceived is different from the BWP where the PDSCH is received at theprevious time-domain position is avoided, an adjustment time intervalrequired for the UE to convert the BWP is avoided, the integrity of thereceived data is ensured, meanwhile, the transmission resources is savedand the communication efficiency of the system is improved.

Thirdly, even when the PDSCH is not received in the previous time-domainposition where the PDCCH is received, a solution is provided to minimizethe latency and resource consumption required for the UE to convert theBWP, thereby reducing the power consumption of the UE to some extent.

Fourthly, in the case of inevitable BWP conversion, by configuring thetime-domain position where the UE receives the PDSCH or the PDCCH tofurther ensure that the received data is not affected by the adjustmenttime of BWP conversion, thereby remarkably increasing the reliability ofthe data received by the UE.

Transmission in a radio communication system includes transmission froma base station (gNB) to a user equipment (UE) (referred to as downlinktransmission), with a corresponding time slot being referred to as adownlink time slot, and transmission from the UE to the base station(referred to as Uplink transmission), with the corresponding time slotbeing referred to as uplink time slot.

In the downlink communication of the radio communication system, thereliability of the receipt of downlink data is ensured by HybridAutomatic Repeat reQuest (HARQ) technology. The downlink data istransmitted by the base station to the UE through a Physical DownlinkShared Channel (PDSCH), and the UE informs the base station whether theUE correctly receives the PDSCH or not by transmitting Hybrid AutomaticRepeat Request-Acknowledgement (HARQ-ACK) feedback information, which istransmitted by the UE through a Physical Uplink Control Channel (PUCCH)to the base station.

For each Transmission Block (TB) of the received PDSCH, or the receivedPhysical Downlink Control Channel (PDCCH) indicating SPS(Semi-Persistent Scheduling) release (both Generally referred to asdownlink HARQ transmission), the UE needs to feed back ACK (CorrectlyReceived) bits or NACK (Error Received or Lost) bits (hereinaftercollectively referred to as HARQ-ACK bits) to the base station bycorresponding uplink subframes. If the gNB receives the NACK bits, theTBs corresponding to the NACK or the PDCCH indicating the SPS releasewill be retransmitted.

When the UE transmits the HARQ-ACK feedback information through thePUCCH, the UE needs to know the PUCCH resources for transmitting theHARQ-ACK. The PUCCH for transmitting the HARQ-ACK may be obtainedthrough an implicit manner or an explicit manner. In the implicitmanner, the PDCCH is obtained by mapping the index of the lowest ControlChannel Element (CCE) of the Physical Downlink Control Channel (PDCCH)scheduling the PDSCH. In the explicit manner, a group of PUCCH resourcesare configured by a higher layer signaling, and a field of the DownlinkControl Information (DCI) (this field is referred to as an HARQ-ACKresource indicator, ARI, HARQ-ACK Resource Indicator) is scheduled toindicate PUCCH resources of the group of PUCCH resources configured bythe higher layer signaling.

In a New Radio (NR) communication system, before establishment of radioresource control, that is, before the higher layer does not configurePUCCH resource set for a UE to transmit the HARQ-ACK, it is impossibleto indicate the PUCCH resources through the ARI field in the DCI of thePDCCH for scheduling the PDSCH. Currently, there exists no an idealsolution as to how to indicate the PUCCH resources of the HARQ-ACK.

In order to make the purpose, technical means and advantages of thepresent application clearer, the present application will be furtherdescribed in detail with reference to the accompanying drawings.

After establishing an Radio Resource Control (RRC) connection, a UE mayreceive a PUCCH set configured by a UE-specific high-layer signaling,and then the ARI in the PDCCH indicates one PUCCH resource in the set totransmit HARQ-ACK. The PUCCH resources in this set are shared by a groupof UEs in the serving cell. If UEs are more in the serving cell, theymay be divided into multiple groups so that the number of users in eachgroup will not be too large. This PUCCH set is shared within one group,and the ARI only indicates one PUCCH resource in the group. Therefore,the number of ARI bits will not be too large. At this time, the numberof the ARI bits may be a certain value, for example, 2, when the PUCCHset configured by each high-layer signaling includes 4 PUCCH resources.However, before establishing the RRC connection, the PUCCH setdetermined by the indication in the broadcasted Reserved Minimum SystemInformation (RMSI) is for all UEs in the serving cell, and cannot begrouped according to the number of users of the serving cell. Forexample, the PUCCH resources of the HARQ-ACK information of the PDSCH ofmessage 4 is determined before the establishment of the RRC connection.

When the PUCCH resources for transmitting the HARQ-ACK feedbackinformation is obtained by combining the received UE-specific high-layersignaling configuration with physical layer information, the mode isreferred to as a first PUCCH resource indication mode. When the UEobtains the PUCCH resources for transmitting the HARQ-ACK feedbackinformation by combining the received broadcast information with thephysical layer information, the mode is referred to as a second PUCCHresource indication mode.

To solve this problem, the present application proposes a method forHARQ-ACK information feedback. As shown in FIG. 19, the most basicmethod for HARQ-ACK information feedback in the present applicationincludes the following steps:

Step 1901: A UE determines a PUCCH resource indication mode.

Where, there are two PUCCH resource indication modes, which are thefirst PUCCH resource indication mode and the second PUCCH resourceindication mode.

Step 1903: The UE obtains PUCCH resources for transmitting HARQ-ACKfeedback information by receiving broadcast information in combinationwith physical layer information.

Wherein, the UE obtains the PUCCH resource set transmitting the HARQ-ACKfeedback information by receiving the broadcast information.

Preferably, the broadcast information may be information in a RMSI.

Preferably, multiple PUCCH resource sets may be determined through aprotocol, and then the bits of the RMSI indicate one of the PUCCHresource sets to be used for user to transmit the HARQ-ACK in theserving cell.

Preferably, the PUCCH resource set indicated by the RMSI includes one ormore PUCCH resources in different formats or a same format. Herein, thePUCCH format may include PUCCH format 0 and PUCCH format 1.

Preferably, the number of PUCCH resources included in different PUCCHresource sets indicated by the RMSI may be different or the same. Forexample, the number of PUCCH resources included in the PUCCH resourceset may be 4, 8, 16, 32, 64, and the like.

Then, the UE selects one PUCCH resource from the PUCCH resource set totransmit HARQ-ACK feedback information by receiving PUCCH resourceindication information in the PDCCH scheduling the PDSCH.

Preferably, the PUCCH resources transmitting the HARQ-ACK feedbackinformation may be jointly determined by an RMSI indication and aphysical layer signaling indication.

In more detail, the UE may first determine one or more PUCCH resourcesets in different formats or the same format by receiving the RMSI, andthen determine one PUCCH resource from the PUCCH resource sets asHARQ-ACK transmission resources by receiving a physical layer signaling(eg, ARI in PDCCH scheduling PDSCH). For example, the UE of one servingcell determines PUCCH resource set S1 by receiving the RMSI. The set S1includes 8 PUCCH resources, namely {s1, s2, s3, s4, s5, s6, s7, s8}, andspecific parameters (for example, a parameters including a PUCCH formatof each PUCCH resource, a location of physical resource blocks occupiedby each PUCCH resource, a location and a number of OFDM symbols occupiedby each PUCCH resource, and the like) of each PUCCH resource in the setis preset by a protocol, and the specific parameters of each PUCCHresource may be the same or different, and the format of each PUCCHresource in the same set may be the same or different. The UE of anotherserving cell determines one PUCCH resource set S2 by receiving the RMSI,and the set S2 includes four PUCCH resources, namely {s1, s2, s3, s4}.The specific parameters of each PUCCH resource in the set are preset bya protocol, and the specific parameters of each PUCCH resource may bethe same or different, and the format of each PUCCH resource in the sameset may be the same or different.

The physical layer signaling used to indicate the PUCCH resources isreferred to as PUCCH resource indication information, and the PUCCHresource indication information may include only bit information of theARI field, and may also be information indicated jointly by bits of theARI field and bits of other fields, for example, by 2 bits of ARI and 2bits of DAI (total 4 bits) are used as PUCCH resource indicationinformation.

Preferably, the number of bits of the PUCCH resource indicationinformation is preset by the protocol. For example, the PUCCH resourceindication information is 3 bits.

Preferably, the number of bits of the PUCCH resource indicationinformation is determined by the number of resources in the PUCCHresource sets indicated by RMSI. For example, PUCCH resource set S1includes 8 PUCCH resources, PUCCH resource indication information is 3bits, and PUCCH resource set S2 includes 4 PUCCH resources and the PUCCHresource indication information is 2 bits.

Preferably, the PUCCH resource indication information of the physicallayer signaling used for indicating the PUCCH resources may be aseparate field, such as an ARI field.

Preferably, the PUCCH resource indication information of the physicallayer signaling used for indicating the PUCCH resources may be acombination of other fields reused and the ARI field, and other fieldsmay include a HARQ-ACK timing relationship indication field, a DownlinkAssignment Indicator (DAI) field, an indication field of the number ofHARQ processes, and the like.

Step 1905: The UE transmits the HARQ-ACK feedback information on thedetermined PUCCH resources.

It should be particularly noted that the present application does notlimit the sequence in which the UE performs the above step 110, step 120and step 130, and the solution obtained after the adjustment of thesequence is performed on one or more of the above three steps is stillwithin the scope of this application.

In order to facilitate understanding of the present application, theabove technical solution of the present application are furtherdescribed in terms of the interaction mode between devices incombination with specific applications as follows:

Embodiment 1

In this embodiment, the number of bits of PUCCH resource indicationinformation used to indicate PUCCH resources in a PDCCH received by a UEis preset by a protocol. The specific steps of HARQ-ACK transmission inthe embodiment are as follows:

Step 210: A UE determines a PUCCH resource set for transmitting HARQ-ACKfeedback information by receiving an indication in a RMSI.

N-bit information may be used in the RMSI to indicate the PUCCH resourceset for transmitting the HARQ-ACK feedback information.

For example, 4-bit information in the RMSI indicates up to 16 PUCCHresource sets, as shown in Table 1, where the 4-bit information in theRMSI may be referred to as R-ARI, i.e., the ARI in the RMSI. The numberof PUCCH resources in each resource set is preset by the protocol.

TABLE 1 Mapping from A-ARI field to PUSCH resource set Number of PUCCHR-ARI resources (preset by MSB, LSB PUCCH resource set protocol) 0000PUCCH resource set s1  8 0001 PUCCH resource set s2  8 0010 PUCCHresource set s3  8 0011 PUCCH resource set s4  8 0100 PUCCH resource sets5  8 0101 PUCCH resource set s6  8 0110 PUCCH resource set s7  8 0111PUCCH resource set s8  8 1000 PUCCH resource set s9  8 1001 PUCCHresource set s10 8 1010 PUCCH resource set s11 8 1011 PUCCH resource sets12 8 1100 PUCCH resource set s13 8 1101 PUCCH resource set s14 8 1110PUCCH resource set s15 8 1111 PUCCH resource set s16 8

The parameters of each PUCCH resource in each resource set are preset bythe protocol. For example, the parameters of one PUCCH resource set areshown in Table 2.

TABLE 2 Mapping from ARI field to PUCCH resource within one resource setPUCCH resource indication Number of information OFDM MSB, LSB PUCCHformat symbols PRB 000 PUCCH format 0  1 PRB 0 001 PUCCH format 0  1 PRB1 010 PUCCH format 0  2 PRB 0 011 PUCCH format 0  2 PRB 1 100 PUCCHformat 1 10 PRB 0 101 PUCCH format 1 10 PRB 1 110 PUCCH format 1 14 PRB0 111 PUCCH format 1 14 PRB 1

The number of resources in a PUCCH resource set for transmittingHARQ-ACK configured by a UE-specific high-layer signaling may bedifferent from the number of resources in a PUCCH resource set fortransmitting HARQ-ACK indicated by RMSI, for example, the number ofresources in the PUCCH resource set for transmitting the HARQ-ACKconfigured by the UE-specific high-layer signaling is 4, and the numberof resources in one PUCCH resource set for transmitting the HARQ-ACKindicated by the RMSI is 8.

Step 220: The UE determines PUCCH resources for transmitting HARQ-ACK.

The UE obtains the PUCCH resources for transmitting the HARQ-ACK byreceiving the PUCCH resource indication information in the PDCCH forscheduling the PDSCH. As the number of resources in the PUCCH resourceset for transmitting the HARQ-ACK configured by the UE-specific higherlayer signaling may be different from the number of resources in thePUCCH resource set used to transmit the HARQ-ACK indicated by the RMSI,the number of bits of the indication information indicating the PUCCHresources in different types of PUCCH resource sets may be different.There are two methods to determine the PUCCH resource indicationinformation below.

Method One:

The numbers of bits of Downlink Control Information (DL DCI) in thePDCCHs including the PUCCH resource indication information may be thesame, and the numbers of bits of the indication information used toindicate the PUCCH resources in the different types of PUCCH resourcesets may be different. For example, the DL DCI includes M bits, where 2bits are ARIs, 4 bits are the indication field of the number of the HARQprocesses, and the total are up to M bits including the other fields.When the PUCCH resources in the PUCCH resource set for transmitting theHARQ-ACK configured by the UE-specific higher layer signaling areindicated, 2 bits of the ARI are used to indicate one PUCCH resourceamong the 4 PUCCH resources in the PUCCH resource set for transmittingthe HARQ-ACK configured by the UE-specific high-layer signaling, whichis referred to as a first PUCCH resource indication mode.

For example, the DL DCI contains M bits, where 2 bits are ARIs, 4 bitsare the indication field of the number of HARQ processes, and the totalis M bits including the other fields. When the PUCCH resources in onePUCCH resource set for transmitting the HARQ-ACK are indicated by theRMSI, 3 bits including 2 bits of the ARI and 1 bit for indicating thenumber of HARQ processes are all used as the PUCCH resource indicationinformation to indicate one of the 8 PUCCH resources in the PUCCHresource set for transmitting the HARQ-ACK indicated by the RMSI, whichis called a second PUCCH resource indication mode.

As the first PUCCH resource indication mode and the second PUCCHresource indication mode have the same number of bits of DCI, theindication mode of the PUCCH resources may be determined as follows.

a: The PUCCH resource indication mode may be determined according to thetype of the search space (SS) of DCI. For example, the DCI in theUE-specific SS adopts the first PUCCH resource indication mode, and theDCI in the common SS adopts the second PUCCH resource indication mode.

b: The PUCCH resource indication mode may also be determined accordingto the type of the Radio Network Temporary Identity (RNTI) of the DCI.For example, the DCI scrambled by the user RNTI (C-RNTI) adopts thefirst PUCCH resource indication mode.

c: Alternatively, the PUCCH resource indication mode may be jointlydetermined according to the type of the search space of the DCI and thetype of the RNTI of the DCI. For example, only the DCI in the common SSand scrambled by the TC-RNTI adopts the second PUCCH resource indicationmode, and the DCI in other cases adopts the first PUCCH resourceindication mode.

d: Alternatively, the PUCCH resource indication mode is determinedaccording to the format type of the DCI. For example, the normal DCIformat (DCI format 1-1) adopts the first PUCCH resource indication mode,and the fall-back DCI format (DCI format 1-0) adopts the second PUCCHresource indication mode.

Method Two:

As the numbers of bits of the indication information of the PUCCHresources in the different types of PUCCH resource sets are different,the numbers of bits of DCI in the PDCCHs including the PUCCH resourceindication information may be different. For example, when the PUCCHresources in the PUCCH resource set for transmitting the HARQ-ACKconfigured by the UE-specific high-layer signaling are indicated, thereare four PUCCH resources in the PUCCH set, with 2-bit ARI is used toindicate one of the four PUCCH resources in the PUCCH resource set fortransmitting the HARQ-ACK configured by the UE-specific high-layersignaling, which is referred to as a first PUCCH resource indicationmode.

For example, when the PUCCH resources in one PUCCH resource set fortransmitting the HARQ-ACK are indicated by the RMSI, 3-bit ARI is usedto indicate one of the 8 PUCCH resources in the PUCCH resource set fortransmitting the HARQ-ACK indicated by the RMSI, which is called asecond PUCCH resource indication mode.

As the numbers of bits of the DCI used in the first PUCCH resourceindication mode and the second PUCCH resource indication mode aredifferent, the way of indicating the PUCCH resources may be determinedas follows.

a: The number of bits for DCI blind detection may be determinedaccording to the type of the search space (SS, Search space), and thenthe PUCCH resource indication mode may be determined. For example, thenumber of bits of DCI blind detection in the UE-specific SS is (N+2,where N is the total number of bits of the other fields except the ARIin the DCI), and the DCI adopts the first PUCCH resource indicationmode. The number of bits of DCI blind detection in the common SS is(N+3, where N is the total number of bits of the other fields except theARI in the DCI), and the DCI adopts the second PUCCH resource indicationmode.

b: The PUCCH resource indication mode may also be determined accordingto the type of the Radio Network Temporary Identity (RNTI). For example,the DCI scrambled by the user RNTI (C-RNTI) adopts the first PUCCHresource indication mode, and the DCI scrambled by the temporary userRNTI (TC-RNTI) adopts the second PUCCH resource indication mode.

c: The PUCCH resource indication mode is determined according to theformat type of the DCI. For example, the normal DCI format (DCI format1-1) adopts the first PUCCH resource indication mode, and the fall-backDCI format (DCI format 1-0) adopts the second PUCCH resource indicationmode.

d: The PUCCH resource indication mode is jointly determined according tothe type of the search space and the type of the RNTI. For example, onlythe DCI in the common SS and scrambled by the TC-RNTI adopts the secondPUCCH resource indication mode, and the DCI in other cases adopts thefirst PUCCH resource indication mode.

Embodiment 2

In this embodiment, the number of bits used to indicate ARI field ofPUCCH resources in a PDCCH received by a UE may vary. The specific stepsof HARQ-ACK transmission in the embodiment are as follows:

Step 310: A UE determines a PUCCH resource set for transmitting HARQ-ACKfeedback information by receiving an indication in a RMSI.

N-bit information may be used in the RMSI to indicate the PUCCH resourceset for transmitting the HARQ-ACK feedback information.

For example, 4-bit information in the RMSI indicates up to 16 PUCCHresource sets, as shown in Table 3, where the 4-bit information in theRMSI may be referred to as R-ARI, i.e., the ARI in the RMSI. The numberof PUCCH resources in each resource set is preset by the protocol andmay be different.

TABLE 3 Mapping from A-ARI field to PUCCH resource set Number of R-ARIPUCCH MSB, LSB PUCCH resource set resources 0000 PUCCH resource set s1 4 0001 PUCCH resource set s2  4 0010 PUCCH resource set s3  4 0011 PUCCHresource set s4  4 0100 PUCCH resource set s5  8 0101 PUCCH resource sets6  8 0110 PUCCH resource set s7  8 0111 PUCCH resource set s8  8 1000PUCCH resource set s9  8 1001 PUCCH resource set s10 8 1010 PUCCHresource set s11 16  1011 PUCCH resource set s12 16  1100 PUCCH resourceset s13 16  1101 PUCCH resource set s14 16  1110 PUCCH resource set s1516  1111 PUCCH resource set s16 16 

The parameters of each PUCCH resource in each resource set are preset bythe protocol. For example, the parameters of one PUCCH resource set areshown in Table 4. This set includes 8 PUCCH resources. The parameters ofanother PUCCH resource set are shown in Table 5. This set includes 4PUCCH resources.

TABLE 4 Mapping from ARI field to PUCCH resource within one resource setARI Number of MSB, LSB PUCCH format OFDM symbols PRB 000 PUCCH format 0 1 PRB 0 001 PUCCH format 0  1 PRB 1 010 PUCCH format 0  2 PRB 0 011PUCCH format 0  2 PRB 1 100 PUCCH format 1 10 PRB 0 101 PUCCH format 110 PRB 1 110 PUCCH format 1 14 PRB 0 111 PUCCH format 1 14 PRB 1

TABLE 5 Mapping from ARI field to PUCCH resource within one resource setARI Number of MSB, LSB PUCCH format OFDM symbols PRB 00 PUCCH format 0 1 PRB 0 01 PUCCH format 0  2 PRB 0 10 PUCCH format 1 10 PRB 0 11 PUCCHformat 1 14 PRB 0

The number of resources in the PUCCH resource set for transmitting theHARQ-ACK configured by the UE-specific high-layer signaling may bedifferent or the same as the number of resources in one PUCCH resourceset used to transmit the HARQ-ACK indicated by the RMSI. For example,the number of resources in the PUCCH resource set for transmitting theHARQ-ACK configured by the UE-specific higher layer signaling is 4, andthe number of resources in the PUCCH resource set for transmitting theHARQ-ACK indicated by the RMSI may be 4, or 8.

Step 320: The UE determines the PUCCH resources for transmitting theHARQ-ACK.

The UE obtains the PUCCH resources for transmitting the HARQ-ACK byreceiving the PUCCH resource indication information in the PDCCHscheduling the PDSCH. As the number of resources in the PUCCH resourceset for transmitting the HARQ-ACK configured by the UE-specific higherlayer signaling may be different or the same as the number of resourcesin one PUCCH resource set used to transmit the HARQ-ACK indicated by theRMSI, the number of bits of the indication information of the PUCCHresources in different types of PUCCH resource sets may be different orthe same, which depends on whether the number of resources in the PUCCHresource set for transmitting the HARQ-ACK configured by the UE-specifichigh-layer signaling is the same or not as the number of resources inthe PUCCH resource set for transmitting the HARQ-ACK indicated by theRMSI.

When the number of resources in the PUCCH resource set for transmittingthe HARQ-ACK configured by the UE-specific high-layer signaling isdifferent from the number of resources in the PUCCH resource set fortransmitting the HARQ-ACK indicated by the RMSI:

Method One:

The numbers of bits of DCI in the PDCCHs including the PUCCH resourceindication information may be the same, and the numbers of bits of theindication information used to indicate the PUCCH resources in differenttypes of PUCCH resource sets are different. For example, the DCIincludes M bits, where 2 bits are ARI, 2 bits are the indication fieldof the number of HARQ processes, and other fields are further included.When the PUCCH resources in the PUCCH resource set for transmitting theHARQ-ACK configured by the UE-specific higher layer signaling areindicated, 2 bits of the ARI are used to indicate one PUCCH resourceamong the 4 PUCCH resources in the PUCCH resource set for transmittingthe HARQ-ACK configured by the UE-specific high-layer signaling, whichis referred to as a first PUCCH resource indication mode.

When the PUCCH resources in the PUCCH resource set for transmitting theHARQ-ACK feedback information are indicated by the RMSI, 4 bits,including 2 bits of the ARI and 2 bits for indicating the number of HARQprocesses, are used to indicate one of the 16 PUCCH resources in thePUCCH resource set for transmitting the HARQ-ACK indicated by the RMSI,which is referred to as a second PUCCH resource indication mode.

As the first PUCCH resource indication mode and the second PUCCHresource indication mode have the same number of bits of DCI, theindication mode of the PUCCH resources may be determined as follows.

a: The PUCCH resource indication mode may be determined according to thetype of the search space (SS). For example, the DCI in the UE-specificSS adopts the first PUCCH resource indication mode, and the DCI in thecommon SS adopts the second PUCCH resource indication mode.

b: The PUCCH resource indication mode may also be determined accordingto the type of the Radio Network Temporary Identity (RNTI). For example,the DCI scrambled by the user RNTI (C-RNTI) adopts the first PUCCHresource indication mode, and the DCI scrambled by the temporary userRNTI (TC-RNTI) adopts the second PUCCH resource indication mode.

c: The PUCCH resource indication mode is determined according to theformat type of the DCI. For example, the normal DCI format (DCI format1-1) adopts the first PUCCH resource indication mode, and the fall-backDCI format (DCI format 1-0) adopts the second PUCCH resource indicationmode.

d: The PUCCH resource indication mode is jointly determined according tothe type of the search space and the type of the RNTI. For example, onlythe DCI in the common SS and scrambled by the TC-RNTI adopts the secondPUCCH resource indication mode, and the DCI in other cases adopts thefirst PUCCH resource indication mode.

Method Two:

As the numbers of bits of the indication information of the PUCCHresources in the different types of PUCCH resource sets are different,the numbers of bits of DCI in the PDCCHs including the ARI may bedifferent. For example, when the PUCCH resources in the PUCCH resourceset for transmitting the HARQ-ACK configured by the UE-specifichigh-layer signaling are indicated, there are four PUCCH resources inthe PUCCH set, with 2-bit ARI is used to indicate one of the four PUCCHresources in the PUCCH resource set for transmitting the HARQ-ACKconfigured by the UE-specific high-layer signaling, which is referred toas a first PUCCH resource indication mode.

When the PUCCH resources in one PUCCH resource set for transmitting theHARQ-ACK are indicated by the RMSI, 3-bit ARI is used to indicate one ofthe 8 PUCCH resources in the PUCCH resource set for transmitting theHARQ-ACK indicated by the RMSI, which is called a second PUCCH resourceindication mode.

As the numbers of bits of the DCI used in the first PUCCH resourceindication mode and the second PUCCH resource indication mode aredifferent, the way of indicating the PUCCH resources may be determinedas follows.

a: The number of bits for DCI blind detection may be determinedaccording to the type of the search space (SS, Search space), and thenthe PUCCH resource indication mode may be determined. For example, thenumber of bits of DCI blind detection in the UE-specific SS is (N+2,where N is the total number of bits of the other fields except the ARIin the DCI), and the DCI adopts the first PUCCH resource indicationmode. The number of bits of DCI blind detection in the common SS is(N+3, where N is the total number of bits of the other fields except theARI in the DCI), and the DCI adopts the second PUCCH resource indicationmode.

b: The PUCCH resource indication mode may also be determined accordingto the type of the Radio Network Temporary Identity (RNTI). For example,the DCI scrambled by the user RNTI (C-RNTI) adopts the first PUCCHresource indication mode, and the DCI scrambled by the temporary userRNTI (TC-RNTI) adopts the second PUCCH resource indication mode.

c: The PUCCH resource indication mode is determined according to theformat type of the DCI. For example, the normal DCI format (DCI format1-1) adopts the first PUCCH resource indication mode, and the fall-backDCI format (DCI format 1-0) adopts the second PUCCH resource indicationmode.

d: The PUCCH resource indication mode is jointly determined according tothe type of the search space and the type of the RNTI. For example, onlythe DCI in the common SS and scrambled by the TC-RNTI adopts the secondPUCCH resource indication mode, and the DCI in other cases adopts thefirst PUCCH resource indication mode.

When the number of resources in the PUCCH resource set for transmittingthe HARQ-ACK configured by the UE-specific high-layer signaling is thesame as the number of resources in the PUCCH resource set fortransmitting the HARQ-ACK indicated by the RMSI:

PUCCH resources in PUCCH resource set for transmitting HARQ-ACKindicated by RMSI and PUCCH resources in PUCCH resource set configuredfor UE-specific higher layer signaling for indicating HARQ-ACK arerespectively indicated in the same PUCCH resource indication mode.

The foregoing description is a specific implementation of the method forHARQ-ACK feedback in the application. The application further providesan equipment for HARQ-ACK feedback. As shown in FIG. 20, the equipmentincludes: PUCCH resource indication mode determining unit, a resourceset determining unit, a resource determining unit and a transmittingunit; wherein the PUCCH resource indication mode determining unit isused to determine the PUCCH resource indication mode for transmittingthe HARQ-ACK; the resource set determining unit is used to determine thePUCCH resource set for transmitting the HARQ-ACK; the resourcedetermining unit is used to determine the PUCCH resources fortransmitting the HARQ-ACK feedback information; and the transmittingunit is used to transmit the HARQ-ACK according to the determined PUCCHresources.

A method for HARQ-ACK information feedback, includes determining, by aUE, Physical Uplink Control Channel (PUCCH) resources for transmittingHARQ-ACK feedback information according to received broadcastinformation and physical layer information, transmitting, by the UE,HARQ-ACK on the determined PUCCH resources.

Herein, the step of determining, by the UE, the PUCCH resources fortransmitting the HARQ-ACK feedback information according to the receivedbroadcast information and physical layer information when the physicallayer information includes PUCCH resource indication information,includes determining, by the UE, a PUCCH resource set for transmittingHARQ-ACK feedback information according to the broadcast information byreceiving the broadcast information, selecting, by the UE, one PUCCHresource from the PUCCH resource set to transmit the HARQ-ACK feedbackinformation by receiving the PUCCH resource indication information in aPhysical Downlink Control Channel (PDCCH) scheduling a Physical DownlinkShared Channel (PDSCH).

Herein an indication mode for the PUCCH resources includes indicatingthe PUCCH resources for transmitting the HARQ-ACK feedback informationby the broadcast information and the physical layer information, orindicating the PUCCH resources for transmitting the HARQ-ACK feedbackinformation by a UE-specific high-layer signaling and the physical layerinformation, before the step of determining, by the UE, the PUCCHresources for transmitting the HARQ-ACK feedback information accordingto the received broadcast information and physical layer information,the method further includes the UE determines the indication mode of thePUCCH resources as follows: indicating the PUCCH resources fortransmitting the HARQ-ACK feedback information by the broadcastinformation and the physical layer information.

Herein in the PUCCH resource set for transmitting the HARQ-ACK feedbackinformation determined according to the broadcast information, thenumbers of PUCCH resources are the same or different.

Herein the PUCCH resource indication information comprises only ARI,and/or the PUCCH resource indication information comprises the ARI andinformation of other fields.

Herein the other fields comprise at least one of Downlink Assignment(DAI), HARQ timing relationship indication information, and indicationinformation of the number of HARQ processes.

Herein the determining the PUCCH resource indication mode comprises atleast one of the following: determining the PUCCH resource indicationmode according to a type of a search space of Downlink ControlInformation (DCI), determining the PUCCH resource indication modeaccording to a type of a radio network temporary identifier of the DCI,determining the PUCCH resource indication mode jointly according to thetype of the search space of the DCI and the type of the Radio NetworkTemporary Identity (RNTI) of the DCI, determining the PUCCH resourceindication mode according to a format type of the DCI.

Herein the determining the PUCCH resource indication mode according tothe format type of the DCI includes determining the PUCCH resourceindication mode according to the number of bits of the PUCCH resourceindication information in the format type of the DCI.

Herein a manner to determine the number of bits of the PUCCH resourceindication information includes obtaining the number of bits of thePUCCH resource indication information preset, or determining the numberof bits of the PUCCH resource indication information according to thenumber of PUCCH resources in the PUCCH resource set indicated by thebroadcast information.

A UE includes a PUCCH resource indication mode determining unit, aresource set determining unit, a resource determining unit, and atransmitting unit, herein, the PUCCH resource indication modedetermining unit is configured to determine a PUCCH resource indicationmode for transmitting HARQ-ACK, the resource set determining unit isconfigured to determine a PUCCH resource set for transmitting theHARQ-ACK, the resource determining unit is configured to determine PUCCHresources for transmitting a HARQ-ACK feedback information, thetransmitting unit is configured to transmit the HARQ-ACK according tothe determined PUCCH resources.

A UE includes a processor, and a memory configured to storemachine-readable instructions that, when executed by the processor,cause the processor to perform the method for HARQ-ACK informationfeedback of any one of above methods.

Methods according to embodiments stated in claims and/or specificationsof the disclosure may be implemented in hardware, software, or acombination of hardware and software.

When the methods are implemented by software, a computer-readablestorage medium for storing one or more programs (software modules) maybe provided. The one or more programs stored in the computer-readablestorage medium may be configured for execution by one or more processorswithin the electronic device. The at least one program may includeinstructions that cause the electronic device to perform the methodsaccording to various embodiments of the disclosure as defined by theappended claims and/or disclosed herein.

The programs (software modules or software) may be stored innon-volatile memories including a random access memory and a flashmemory, a read only memory (ROM), an electrically erasable programmableread only memory (EEPROM), a magnetic disc storage device, a compactdisc-ROM (CD-ROM), digital versatile discs (DVDs), or other type opticalstorage devices, or a magnetic cassette. Alternatively, any combinationof some or all of the may form a memory in which the program is stored.Further, a plurality of such memories may be included in the electronicdevice.

In addition, the programs may be stored in an attachable storage devicewhich is accessible through communication networks such as the Internet,Intranet, local area network (LAN), wide area network (WAN), and storagearea network (SAN), or a combination thereof. Such a storage device mayaccess the electronic device via an external port. Further, a separatestorage device on the communication network may access a portableelectronic device.

In the above-described detailed embodiments of the disclosure, acomponent included in the disclosure is expressed in the singular or theplural according to a presented detailed embodiment. However, thesingular form or plural form is selected for convenience of descriptionsuitable for the presented situation, and various embodiments of thedisclosure are not limited to a single element or multiple elementsthereof. Further, either multiple elements expressed in the descriptionmay be configured into a single element or a single element in thedescription may be configured into multiple elements.

While the disclosure has been shown and described with reference tocertain embodiments thereof, it will be understood by those skilled inthe art that various changes in form and details may be made thereinwithout departing from the scope of the disclosure. Therefore, the scopeof the disclosure should not be defined as being limited to theembodiments, but should be defined by the appended claims andequivalents thereof.

While the disclosure has been shown and described with reference tovarious embodiments thereof, it will be understood by those skilled inthe art that various changes in form and details may be made thereinwithout departing from the spirit and scope of the disclosure as definedby the appended claims and their equivalent.

What is claimed is:
 1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving, from a base station, information for configuring a first bandwidth part (BWP) via higher layer signaling, wherein the first BWP is configured to be used in case that a physical layer signaling for a physical downlink shared channel (PDSCH) is not received during a time interval on a using BWP for physical downlink control channel (PDCCH) detection and PDSCH reception; receiving, from the base station, signals on a second BWP set as the using BWP and is different from the first BWP; and in a case that the physical layer signaling for the PDSCH is not received on the second BWP during the time interval, changing the using BWP from the second BWP to the first BWP.
 2. The method of claim 1, wherein the information includes a sequence number of the first BWP among one or more BWPs configured via higher layer signaling.
 3. The method of claim 1, wherein the second BWP is indicated by downlink control information (DCI) including a sequence number of the second BWP among one or more BWPs configured via higher layer signaling.
 4. The method of claim 1, wherein the time interval is configured by higher layer signaling.
 5. The method of claim 1, further comprising: identifying that an interval until a beginning of a time slot where the UE can receive signals on the first BWP is required, based on the time interval for the changing of the using BWP, wherein the UE is configured not to receive signals within the interval.
 6. A method performed by a base station a wireless communication system, the method comprising: transmitting, to a user equipment (UE), information for configuring a bandwidth part (BWP) via higher layer signaling, wherein the first BWP is configured to be used in case that a physical layer signaling for a physical downlink shared channel (PDSCH) is not received during a time interval on a using BWP for physical downlink control channel (PDCCH) detection and PDSCH reception; transmitting, to the UE, signals on a second BWP different from the first BWP; and transmitting, to the UE, signals on the first BWP based on a changing of the using BWP from the second BWP to the first BWP.
 7. The method of claim 6, wherein the information includes a sequence number of the first BWP among one or more BWPs configured via higher layer signaling.
 8. The method of claim 6, wherein the second BWP is indicated by downlink control information (DCI) including a sequence number of the second BWP among one or more BWPs configured via higher layer signaling.
 9. The method of claim 6, wherein the time interval is configured by higher layer signaling.
 10. The method of claim 6, wherein, based on the time interval for the changing of the using BWP, signals are not transmitted to the UE within a required interval until a beginning of a time slot where the UE can receive signals on the first BWP.
 11. A user equipment (UE) in a wireless communication system, the UE comprising: at least one transceiver; and at least one processor coupled to the at least one transceiver and configured to: receive, from a base station, information for configuring a first bandwidth part (BWP) via higher layer signaling, wherein the first BWP is configured to be used in case that a physical layer signaling for a physical downlink shared channel (PDSCH) is not received during a time interval on a using BWP for physical downlink control channel (PDCCH) detection and PDSCH reception, receive, from the base station, signals on a second BWP set as the using BWP and is different from the first BWP, and in a case that the physical layer signaling for the PDSCH is not received on the second BWP during the time interval, change the using BWP from the second BWP to the first BWP.
 12. The UE of claim 11, wherein the information includes a sequence number of the first BWP among one or more BWPs configured via higher layer signaling.
 13. The UE of claim 11, wherein the second BWP is indicated by downlink control information (DCI) including a sequence number of the second BWP among one or more BWPs configured via higher layer signaling.
 14. The UE of claim 11, wherein the time interval is configured by higher layer signaling.
 15. The UE of claim 11, wherein the at least one processor is further configured to identify that an interval until a beginning of a time slot where the UE can receive signals on the first BWP is required, based on the time interval for the changing of the using BWP, and wherein the UE is configured not to receive signals within the interval.
 16. A base station a wireless communication system, the base station comprising: at least one transceiver; and at least one processor coupled to the at least one transceiver and configured to: transmit, to a user equipment (UE), information for configuring a bandwidth part (BWP) via higher layer signaling, wherein the first BWP is configured to be used in case that a physical layer signaling for a physical downlink shared channel (PDSCH) is not received during a time interval on a using BWP for physical downlink control channel (PDCCH) detection and PDSCH reception, transmit, to the UE, signals on a second BWP different from the first BWP, and transmit, to the UE, signals on the first BWP based on a changing of the using BWP from the second BWP to the first BWP.
 17. The base station of claim 16, wherein the information includes a sequence number of the first BWP among one or more BWPs configured via higher layer signaling.
 18. The base station of claim 16, wherein the second BWP is indicated by downlink control information (DCI) including a sequence number of the second BWP among one or more BWPs configured via higher layer signaling.
 19. The base station of claim 16, wherein the time interval is configured by higher layer signaling.
 20. The base station of claim 16, wherein, based on the time interval for the changing of the using BWP, signals are not transmitted to the UE within a required interval until a beginning of a time slot where the UE can receive signals on the first BWP. 